creation date: Wed Dec 2 18:04:38 MET 1998

28#1 
A^7=id
B^2=id (A)
C^2=B (A^6 B)
28#2 
A^2=id
B^7=id (A)
C^2=A (A B)
28#3 
A^7=id
B^2=id (A)
C^2=id (A^6 B)
28#4 
A^7=id
B^2=id (A)
C^2=id (A B)

last updated: Wed Dec 2 18:04:49 MET 1998 , Anton Betten